The World Naked Bike Ride's website states that the event is "an annual, worldwide bike ride that highlights the vulnerability of cyclists everywhere, and decries society's dependence on pollution-based transport." The Portland Police Bureau will... Last Tuesday was the Summer Solstice, the longest day of the year, and though you may not have realized it, it’s also a day when some hiking enthusiasts enjoy nude hiking — that’s right, Naked Hiking Day (or #Hike Naked Day, if you’re on Instagram). Not only is baring your skin natural, but going nude is also rich in both psychological and biological benefits. In the UK, thousands witnessed a spectacular dawn as they gathered at Stonehenge for the summer solstice – on what could be the hottest since 1936.